With the rapid development of media means and various network platforms in the era of big data,the ideological and political education of graduate students is faced with new challenges and opportunities. From the actual situation,the ideological and political education evaluation mechanism has to be constructed. Meanwhile,value logic,practice logic and reality logic need to be strengthened in order to ensure that the graduate student’s cognition practices are transformed wisely and ensure that the evaluation mechanism stands for leading functions,the rational protection functions as well as practical regulating functions. To comply with the requirements of big data era and to promote evaluation mechanism innovation are the basic ways to improve the effectiveness and timeli- ness of ideological and political education.